【作者】 杨旌；

【导师】 黄求顺； 胡岱文；

【作者基本信息】 重庆大学 ， 岩土工程， 2004， 硕士

【摘要】 近年来,随着建设活动的日益增多,水平承载桩得到了越来越广泛的应用。水平承载桩的计算宽度是一个重要的设计参数,研究计算宽度就是研究桩岩共同作用,但目前国内外对于计算宽度的研究较少,本文针对嵌固在软质岩中的水平承载桩,就计算宽度问题进行了现场试验及程序计算分析两方面的研究。水平承载桩的受力状态是非常复杂的三维空间问题。在水平荷载作用下,由于桩侧摩阻力的传递作用,使得桩周有更多岩体参与承受水平荷载,因此,桩侧边长度对于水平承载桩的受力状态是有很大影响的,本文就此引入扩散角的概念,用此概念说明桩侧边长度对于计算宽度的影响,从而建立计算宽度的计算公式。在研究的具体方法上,本文先就现场试验得出的数值结果计算出实际计算宽度; 其次将有限元程序计算的结果与试验结果进行对比分析;最后利用有限元程序ANSYS就计算宽度的研究进行进一步的分析,如嵌岩深度、桩侧边长度对计算宽度的影响,研究表明随着桩侧边长度的增大,水平抗力的扩散作用就越发明显,同时在一定的嵌岩深度范围内,随着嵌岩深度的增加,桩所能承受的水平荷载也随之增加;最后通过改变桩截面尺寸以及嵌岩深度得到各模型桩的计算宽度值,并用概率统计理论分析得出可用于设计的计算宽度标准值。更多还原

【Abstract】 In the near future, along with the increase of construction, the laterally loaded piles have been gained more and more application. The calculative width of the laterally loaded pile has been a very important parameter. To study it is to study the pile-rock interaction. But at present the research on the calculative width has been less abroad and home. The text aims at the laterally loaded pile that telescoped the soft-rock, putting up the research on the field test and the account with the program.The pile loaded laterally are actually loaded in three dimension. With the action of the lateral load, owing to the impress of the friction on both side of the pile, there are more and more rock around the pile participate in the interaction. So, the side width of the pile has the prodigious infection. The text introduces the conception of the radial angle, and uses it to explain the inflection of the side width, and establishes the formula of the radial angle. The main contents are as follows: in the first place, the text uses the date gained from field test to work out the calculative width ; in the next place, uses the result of the matrix suction contrast to the date from field test; lastly, the matrix suction contributions to farther analysis, i.e. change of the depth rock-socket and the side width of the pile, and uses them to obtain the calculative width. In the end, the text obtains the standard value of the calculative width by the probability stat theory.更多还原